#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>

int main(int argc,char **argv)
{
    printf("hello world\n");

    //exec函数族
    //1.execl
    //execl("./fork","./fork","argv1","argv2",NULL);
    //2execv
    //char *arg[]={"./fork","hello1","hello2",NULL};
    //execv("./fork",arg);
    //3execlp
    //execlp("/home/ubuntu/ProcessStudy/fork","./fork","argv1","argv2",NULL);
    //4execvpe

    printf("welcome to jsetc\n");
    return 0;
}